Highest Degrees of Breathability & Airtightness

Holz100 - Breathable & Airtight

​Wood breathes in all components - this is a great natural advantage when creating living spaces. Holz100 has a low diffusion resistance and a high level of airtightness which allows us to provide a 50-year guarantee against condensation and mold.

The high degree of breathability combined with the airtightness of Holz100 results in a multifunctional solution – a building material that doesn’t require elaborate layer arrangements in walls to achieve the ideal indoor environment.

As the Holz100 building component consists only of wood, it has no boundaries in permeability between its layers. On the other hand, common building systems consist of layers of different materials which easily cause varied vapour permeability and condensed air humidity. However, for Holz100 homes, there is no necessity for vapour barriers as the wood breathes by itself and naturally controls the indoor climate.

Holz100 has a diffusion resistance of u=37.2m. This means that for a 17cm thick Holz100 panel, the diffusion equivalent in air layer thickness is 6.3m (according to EN ISO 10456, vapour diffusion resistance of solid wood is u=50).

The airtightness of Holz100 ensures no unnecessary heat loss. Holz100 residents have the advantage of a healthy, ideal indoor climate with high energy efficiency. Holz100 walls are airtight on their surface due to multiple layers of cross laminated solid wood and can reach 0.6 if put through the Blow-Door Test.

​
Permeability and Airtightness

Holz100 is a cross-layered thick wall which consists of only one material - wood. Therefore, there is no fluctuation in vapor permeability within the wall and it does not condense any air humidity, unlike vapour-blocking films or impermeable insulation materials which are frequently used in conventional methods of construction.

Since structural engineers and technical institutions have been able to prove the airtightness of buildings through thermographic recordings and/or appropriate tests such as the "blower door test", a lot has changed. The world of wooden houses became divided into the good (leakage resistant) and the bad (high air leakage) in terms of energy efficiency. Wooden houses, whistling from all holes, are unfortunately not a rarity, and are quite wrong in referring to the building material as "wind barracks".

Leaking grommets, balconies, sockets and walls are the main causes of air leakage in wooden homes, but they have nothing at all to do with the material itself. The fault lies with its inadequate engineering & processing of structural components.

A careless plumber or electrician who bores a hole through the wall after the carpenter's work suffices to destroy everything again. The borehole acts like a needle puncture of an inflated plastic bag - there goes the building's energy efficiency. From the source of cold air enters condensation, moisture, mold and odor from behind the framework, plaster or plasterboard in the winter.

The best way to avoid this is to build with our solid wood construction - Holz100. In our case of homogeneous walls, the vapor pressure is not abruptly trapped in a film layer, but is "gently" degraded throughout the entire mass. Holz100 walls are tight even at the highest wind pressure thanks to its high precision and quality of prefabrication. The connections of the wall elements are produced in a manner of utilizing a tongue-and-groove system which makes our system secure and airtight. The surfaces can then remain natural or be painted, plastered, clipped, etc. depending on the homeowner's tastes of interior design.